﻿// The MIT License (MIT)
// 
// Copyright (c) 2015-2018 Rasmus Mikkelsen
// Copyright (c) 2015-2018 eBay Software Foundation
// https://github.com/eventflow/EventFlow
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy of
// this software and associated documentation files (the "Software"), to deal in
// the Software without restriction, including without limitation the rights to
// use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
// the Software, and to permit persons to whom the Software is furnished to do so,
// subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
// FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
// COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
// IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using EventFlow.Core;

namespace EventFlow.Tests
{
    public static class Helpers
    {
        public static string GetProjectRoot()
        {
            var codeBase = ReflectionHelper.GetCodeBase(typeof(Helpers).GetTypeInfo().Assembly);
            return GetParentDirectories(codeBase).First(IsProjectRoot);
        }

        public static IEnumerable<string> GetProjectFiles(string searchPattern)
        {
            return Directory.EnumerateFiles(
                GetProjectRoot(),
                searchPattern,
                SearchOption.AllDirectories);
        }

        private static IEnumerable<string> GetParentDirectories(string path)
        {
            if (!Directory.Exists(path)) throw new ArgumentException($"Directory '{path}' does not exist!");

            var parent = Directory.GetParent(path);
            while (parent != null)
            {
                yield return parent.FullName;
                parent = parent.Parent;
            }
        }

        private static bool IsProjectRoot(string path)
        {
            return Directory.GetFiles(path).Any(f => f.EndsWith("README.md"));
        }
    }
}